﻿/*
 * Copyright (c) 2023 Proton AG
 *
 * This file is part of ProtonVPN.
 *
 * ProtonVPN is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ProtonVPN is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ProtonVPN.  If not, see <https://www.gnu.org/licenses/>.
 */

using System;

namespace ProtonVPN.Common.Extensions
{
    public static class ByteExtensions
    {
        public static byte[] TrimTrailingZeroBytes(this byte[] bytes)
        {
            if (bytes.IsNullOrEmpty())
            {
                return bytes;
            }

            int i = bytes.Length - 1;
            while (i >= 0 && bytes[i] == 0)
            {
                --i;
            }

            int newSize = i + 1;
            byte[] result = new byte[newSize];
            Array.Copy(bytes, result, newSize);

            return result;
        }
    }
}